diff --git a/rust/src/client.rs b/rust/src/client.rs
index a91383dd06..d1c5c20489 100644
--- a/rust/src/client.rs
+++ b/rust/src/client.rs
@@ -236,6 +236,11 @@ pub(crate) fn client_render_download_progress(
     }
 }
 
+/// Install packages live into the running root filesystem.
+/// This is only intended for use as part of a container builds.
+/// For now, we fork/exec microdnf because this is exactly what its
+/// main use case is, but in the future we may change the rpm-ostree code
+/// to handle this more directly.
 pub(crate) fn microdnf_install(args: Vec<String>) -> Result<()> {
     let mut microdnf_command = "microdnf";
     let alt_microdnf_location = "/usr/lib/rpm-ostree/microdnf";